Efficacy and safety of second photodynamic therapy for local failure after salvage photodynamic therapy for esophageal cancer

Photodynamic therapy (PDT) is an optional salvage treatment for local failure of esophageal squamous cell carcinoma (ESCC) after chemoradiotherapy; however, local failure after PDT sometimes occurs. In such cases, second PDT is sometimes attempted, but its outcomes remain unclear. This study aimed to evaluate the efficacy and safety of second PDT.We enrolled patients who underwent PDT for local failure of ESCC after chemoradiotherapy. We...